Long-knife cloth-cutting machine.



Patented Jan. l4, I902.

E. m. WARING. LONG KNlFE CLOTH CUTTING MACHINE.

(Application filed Mar. 26, 1900.,

2 Sheets-Sheet I.

(No Model.)

. 721 6.- raorx cm /ifl MW No. 69I,090.

Patented lan.l4, 1902. E. M. WARING. LONG KNIFE CLOTH CUTTING MACHINE.

(Application filed Mar. 26, 1900.\ (No Model.)

2 Sheets-Sheet 2.

. INVEN'TOR: MW 2% g m: uunms PETERS co., PNOTO-LITHD, wAsnmaTam o. c.

UNITED rates EDXVARD M. WVARING, OF BROOKLYN, NEWV YORK.

LONG-KNIFE CLOTH-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 691,090, dated January 14, 1902.

Application filed March 26,1900- Serial No. 10,229. (No model.)

To aZZ whom, it may concern:

Be it known that I, EDWARD M. WARING, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in LongKnife Cloth- Outting Machines, of which the following is a specification.

This invention relates to an improvement in electric cloth-cutting machines, and particularly to that class of said machine wherein the cutting is done by a reciprocating knife. It may therefore properly be termed a long-knife cutting-machine, since it operates on the cloth in substantially the same manner as the long knife operated through a slit in the table by hand.

The objects of the invention are the simplification of the driving mechanism for the reciprocating knife both as to the number of parts and as to the mode of operation; also, to so design the parts of the motor and mount the same with respect to the base of the machine that the whole shall -be equally balanced over the center of said base.

The invention therefore consists in the construction and arrangement of parts substantially as hereinafter described and claimed.

In the accompanying drawings, which form a part of this specification, Figure 1 represents one form of my machine in side elevation, one of the supporting-brackets for the armature being removed. Fig. 2 is a partlysectionized front elevation of the machine illustrated in Fig. 1. Fig. 3 is a plan of the standard of the machine. Fig. at is a front elevation of a modified form of my reciprocating cutting-machine. Fig. 5 is a partlysectionized front elevation of a further modification of said machine.

The principal elements of the machine are the standard, consisting of the base J; the column or uprightj, to which is attached the handle H; the motor, consisting of the armature A, the field-coils F, the pole-pieces F, and the commutator U; the reciprocating knife P; the cross-head V, and the pitman Z for transmitting power from the armature to the knife.

Referring to Figs. 1 to 3, the base is provided on its under side with slight projections M to decrease the area of supportingsu rface, and these projections may have mounted in them antifriction-rollers, if desired, this being a common well-known means of supportingcloth-cntting machines intended to travel over the table on which is spread the cloth to be out. The base is tapered to a thin edge all around and is preferably provided at its forward portion with a still thinner edge formed on a supplemental plate of steel, as illustrated at K, whereby the smooth and ready insertion of the base under the cloth is insured. The column j is made as thin as practicable, and has formed therein a recess the back Wall of which is indicated by the line so, and in this recess is guided the knife P. One or more antifriction-rollers, as 0, may be mounted in the standard at the back of the recess to furnish a suitable bearing for the rear edge of the knife. The lower end of the knife is made oblique to its forward edge and is sharpened. The forward edge of the knife 19 is also sharpened, so that the knife Will cut during its upstroke as Well as during its downstroke. a pressure-foot to keep the lay of cloth down during the upward stroke'of the knife. One form of pressure-foot for this purpose is shown at G. This is preferably made vertically adjustable upon the standard. For this purpose it may be provided with a slot, as seen in Fig. 2, and attached to the standard by a suitable thumb-nut, as 9 The pressure-foot is preferably provided with two branches at its lower end, one, as g, extending along one side of the knife and in front thereof,while the other, g,extends along the opposite side of the knife. It is also preferable to raise the base slightly at the place where the knife enters it, so as to insure a positive cut through the lowermost layer of cloth, and to press said layers more closely together as the knife is about to cut through them. This may be done by means of detachable steel plates forming the raised portion N and the abrupt elevation at at the immediate edge of the slot or recess a: into which the knife descends. This construction also provides for the renewal of that part of the base without renewing the whole base.

The upper end of the knife is attached to It is preferable to provide the cross-head V in any suitable way, as by means of the bolt R, which passes into the pin L, the pin L extending through the crosshead and having attached at its opposite end the pitman I. The cross-head V is mounted in a suitable slide or guide g, which is formed in the plates Q Q, these being preferably detachable pieces bolted to the upright j. The lubrication of the guide q should be effected in a manner to prevent lubricant from getting onto the cloth, and for this purpose it is well to provide a layer of felt, as W, at the lower end of the guide. A similar layer W may also be provided at the upper end of the guide, and a strip of felt or other fibrous material may be placed at the edges of the guide, as indicated at win Fig. 3. By this means the guide may be well lubricated without the danger of the oil escaping therefrom;

The motor is mounted upon the fiangesj at the upper end of the standard by screws passing into the cheek-pieces F of the poles of the field-magnets. The cores and polepieces of the field-magnets are preferably laminated,as shown at f, and the cheek-pieces are held thereto by suitable screws, as f. To the cheek-pieces F are secured the brackets BB by means of suitable screws passing into holes,asf ,in said cheek-pieces. In these brackets are formed bearings for the journals of the armature. To the end of the amature opposite the commutator is secured a disk which carries a counterbalance or balanced lever, as D, from the upper portion of which,

as at 0, extends the crank-pin c, the opposite end of said pin entering the upper end 0 of the balanced lever D. Upon the crank-pin c is journaled the pitman I. The balanced levers D and Dconstitute a counterbalanced double crank. This provides a more stable construction for the support of the crank-pin and at the same time enables the pitman to be brought nearer to the vertical plane of the cross-head, thereby shortening the pin L,projecting from the cross-head.

One end of the armature-shaft may be extended beyond the bearin g and screw-threaded, as shown at s, Fig. 2, to provide a support for the emery-wheel for grinding the knife. A cap-nut, as E, may be placed on said screw for protection when an emery-wheel is removed. The bracket B is preferably provided with a downward extension I), which serves as a guard for the lower end of the pitman. The raceway for the cross-head V might be connected to or formed in this extension.

It will be noted that in the construction just described the field-magnets balance one another over the-center of the standard, and the commutator and cranks likewise balance one another and are in the same horizontal plane therewith and removed ninety degrees therefrom. This gives a perfect balance for the motor over the center of the standard and is the preferred construction. The motor construction, however,substantially as shown in Fig. 4, may be used wherein there is but one field-coil, asjseen at Fig. 4. This is mounted between the'pole-pieces F, which, as in the previous construction, are bolted to the projections 7' at the upper end of the standard. In this form of motor the field and armature are in the same vertical plane and counterbalance one another over the center of the standard. In both forms the center of gravity of the motor is directly over the column j.

The brackets B B provide bearings for the journals of the armature and are secured to the poles of the field-coil substantially as in the machine above described. The knife, however, is secured to the cross-head on the side next to thepitman by means of the screw R, substantially as in the other form of machine. The balanced lever D is of the same form as in the other machine, but has added thereto an auxiliary counterbalance Z, consisting of a screw that may be turned in and out of the counterbalance, and is provided with a suitable jam-nut for holding it in any adjusted position. This provides compensation for the wearing away of the knife. other details this form of machine is the same as the one first described.

\Vhere it is desired to obtain a greater speed of reciprocation for the knife, an intermediate gear, as Y, may be introduced, as indicated in Fig.'5, this gear being made to mesh with a gear, as Y, secured to the armature A in any suitable way, it being secured in the machine illustrated upon the periphery of the armature. The gear Y is mounted upon the stud-bearing, as y, and is provided with a balanced crank D, from which extends the crank-pin c. The pitman I connects this crank-pin to the pin L, which passes through the cross-head V. The knife P is secured to the cross-head by the screw R, as before. The motor is preferably of the form shown in Figs. 1 and 2.

In none of the machines described have the commutator-brushes been illustrated, it being understood that they are of the ordinary type and suitably secured to the brackets B.

Other modifications in details of construction besides those above mentioned may be made without departing from the spirit of the invention.

I claim as my invention 1. The combination with the base, of a recessed column arising therefrom and provided with integral flanges at its upper end, of the motor mounted upon said flanges, the guide secured to the side of the column, the crosshead therein, the knife secured to one side of the cross-head and reciprocating in the recess of the standard, and the pitman secured to the other side of the cross-head and connecting 1Cilt to the motor, all substantially as set ort 2. In a cloth-cutting machine, the combination of an electric motor having a balanced crank-pin on its'armature, a standard for said motor located directly under the center of gravity thereof and in a plane at right angles to the axis of the armature, a reciprocating knife mounted in a recess in said standard, a guided cross-head to one side of which the knife is connected, and a connection between said crank-pin and said cross-head for recip- 1o rocating the latter.

Signed at New York, in the county of New York and State of New York, this 23d day of March, A. D. 1900.

EDWARD M. WARING.

Witnesses:

DELBERT H. DECKER, ETHEL L. LAWLER. 

